Globe and check valve.



UNITED STATES PATENT OFFICE.

CHRISTIAN E. LOETZER, OF SAYRELPENNSYLVANIA.

lGLOBE AND CHECK VALVE. y

SPECIFICATION formingpart of Letters Patent No. 660,193, dated October23, 1900.

Application filed April 6 1900.

To @ZZ whom t may concern:

Be it known that I, CHRISTIAN E. LoErzER, a citizen of the UnitedStates, residing at Sayre, in the county of Bradford and State ofPennsylvania, have in ven ted certain new and useful Improvements inGlobe and Check Valves; and I do hereby declare the following to be afull, clear, and eXact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to improvements in valves for regulating the iiowof iiuid, such as globe and check valves.

It is often desirable, as is well known, to have immediate access tothechambers or interiors of valves of Water-pipes, steam-boiler feed-pipes,and the like for the purposes of cleaning, removing obstructions, andmaking alterations or repairs without the necessity and inconvenience ofdrawing o the water or other fluid and detaching the valve-casing fromthe pipes, as is necessary with the ordinary check and globe valves.Numerous constructions have been devised whereby the flow of waterthrough the valve may be cut off and access then had to thevalve-chamber and valve-seat through the valve-casing; butsuchcontrivances have been more or less objectionable in use on account, -insome cases, of the complexity of the construction audits liability toget out of order and in other cases the inconvenience and difficulty ofmanipulation incident to the removal and disconnection of the parts ofthe structure and the reassembling of the same for cleansing purposes,as well as the liability to leakage in use.

The object of my invention is .to simplify the construction and increasethe efficiency of this class of devices and to provide a simple andinexpensive but thoroughly efficient valve for regulating the iiow inwater-pipes and the like, with provision for cutting off the 110W offluid through the valve and for ready and immediate access tol the'valvechamber through the casing, b ut'without the disadvantages andobjections hitherto noticedV in devices of this character.

The invention will first be hereinafter more particularly described withreference to the accompanying drawings, which form a part sena No.11,834. (N0 moda.)

of this specitication, and then pointed out in the claims at the end ofthe. description.

In said drawings, in which corresponding parts in the different viewsare designated by like letters of reference, Figure l represents invertical section a globe-valve embodying my invention. Fig. 2 is asimilar view of a modification of my invention as embodied in acheck-valve, the parts being similarly arranged. Fig. 3 is a sectionalview similar to that shown in Figs. l and 2 with theplug tu rned so asto cut off communication between the inlet and discharge orifices of thecasing, the bonnet or cap and also the valve proper being removed topermit access to the valveseat; and Fig. 4 is a view similar to Fig. 3,showing a reaming tool inserted into the valve-chamber for the purposeof truing the valve-seat.

The letter Ain the drawings denotes a suitable valve shell or casinghaving the lateral oppositely-projecting end portions B and B, which arethreaded to engage threaded pipe ends, adapting the valve to be placedbetween and connect two pipe-sections. The interior of the shell orcasing A for receiving the plug which controls the opening therethroughmay be cylindrical -or taperedAv in` the form of an inverted frustum ofa cone and open at topf and bottom, and the said chamber communi- Acateswith the inlet portion B preferablyl by a lateral orifice h at its lowerportion and'with the exit or discharge portion B byfa similar orifice b.y

Fitted closely within the shell orcasing A, but in such manner as to berevoluble therein, is a hollow 0r`cup -like plug C, forming a`valve-chamber and having lateral oriices c and c', oppositely disposedin the lower and upper portions of the'cup, respectively, adapted toregister with the orifices h and b', so as to establish communicationbetween the inlet B apd outlet B through the plug in v011e position ofthe turning plug C, as in Figs. 1 and 2, but to face the interior wallsof the casing or shell A and shut off communication between the saidinlet and exit when the plug is turned in the opposite position or givenone-half of a revolution, as in Figs. 3 and 4. The plug C is furtherinteriorly provided between the orifices c and c with a suitable IOOcheck-valve such as is employed in feed-pipes for steam-engine boilersand the like adapted to rise and fall automatically according to thepressure on opposite sides of the valve.

The valve casing A', wherein is fitted the turning plug C, is preferablyprbvided with an enlarged interiorly-screw-threaded portion a to engagea similarly exteriorly-threaded portion of the bonnet or cap G, Fig. l,or G', Fig. 2, which cap closes the cup or valvechamber within the plugC and also the upper part of the casing, so as to prevent leakage ot'the fluid between the walls of the plug and the valvecasing. It will beobserved that by virtue of the enlarged threaded por tion a an annularledge' or shoulder a2 is formed within the valve casing above or aroundthe top of the chamber in which the cup-like plug C is fitted, and t-hetop of the plug C is preferably flush with said ledge or shoulder, andthe lower portion ofsaid bonnet or cap G or G bears partly on said ledgeand partly on the plug, thereby thoroughly preventing leakage betweenthe plug and the walls of the Valvecasing and confining the plug tightlyin place. The cap or bonnet G (shown in Fig. l) is provided with acentral interiorly-threaded opening for engaging the threaded valve-steme, and said cap G may be exteriorly threaded at its upper portion andprovided with an interiorly-threaded cap H, surrounding the valve-stema. The bonnet or cap G (shown in Fig. 2) is closed at the top, but maybe provided with acentral guidepassage, as g', for guiding the valvesteme as the valve rises and falls. Preferably the bonnet G or G and theinteriorlythreaded portion a of the valve-casing A are threaded to astandard-pipe size, so that in cases of emergency or accident a commonpipe-plug may be substituted for the capor bonnet.

The plug C is provided with an extension below the valve-chamber, aportion of which may be screw-threaded, as at o3, Fig. l, to engage afastening-nut 7c for locking the plug within the valve-casing, while thependent portion c4 may be polygonally shaped for engagement with awrench for the purpose of turning the plug within the casing A. Thepolygonal portion c4 being formed in the lower solid portion of the plugC, the plug will not be injured or its Walls indented by the wrench.

It will be apparent that the nut 7o serves not only to lock the plugwithin the Valvecasing, but also to prevent leakage. In Fig.

2 is shown a` modification of the nut, which is denoted by the letter7a', said nut heilig formed integrally with a cap k2, covering the`lower portion of the plug C.

When it is desired to have access to the valve-chamber for cleaning orremoving obstacles from the valve or for making alterations or repairs,the How' of water or iiuid `through the valve may be immediately cut offby turning the plug C one-half of a revo lution, as in Figs. 3 and 4,without drawing h the water-pressure from; the pipes or operating othervalves in the pipe-line, as is usually necessary. The cap or bonnet maythen be removed and access had to the Valvechauiber.

Fig. et shows a repairing-tool or millingreamer L inserted into thevalve-chamber or plug C for the purpose of truing the valveseat. Thetool L is provided with a stem Z, guided in a sleeve or opening througha `guide block or plug M, having a portion m liitting within the upperchamber or portion of the valve-chamberwithinthe plug` C. By revolvingthe tool L the valve-seat may be `ground and trued. The valve maylikewise be reground or a new valve inserted. l It will be apparent thatwith my device ac cess may be had to the valve-chamber and irepairs madeat any time with full pressure on Within the pipes. Thus in the case ofa lfeed-pipe for boilers the necessity of waiting ffor the boiler tocool and to reduce the pressure in the boiler is avoided. Furthermore,ithe plug C forms a brace or support through he casing A, so that thevalve-seat is not liable to be twisted or bent out of shape and becoineleaky, as is the case with the usual lform of valve when the valve isscrewed into a line of pipe.

It will be observed that the plug which controls the inlet and exitopenings through the valve-casing at different elevations, so as to`balance the valve when seated, is confined within the casing bythe capor bonnet, which is secured to the casing above said plug and servesalso as a cover or closure for the valvechamber in said plug, as well asfor the opening at the top of the valve-casing, whereby I avoid theliability to leakage which is incident to the use of a turn-plug havinga cap or bonnet mounted thereon, and, furthermore, the plug and thevalve seated therein are snugly housed Within the casing without anyprojection of the plug above the same, which is liable to cause injuryto the plug, resulting from a stroke by accident or otherwise from theoutside, and instead of manipulating the plug from above, as usual, itis manipulated from below the casing, through whichits lower endprotrudes, and the upward pressure of the water is exerted against thecap or bonnet, while the downward pres- Isure is exerted on the plugonly, thus tending to maintain a close contact of the plug with theinterior of the valve-chamber or casing in which it is housed, so as toeiectually IIO seal the joints, the pressure of the valve itself whenseated being similarly exerted.

I thus provide a very simple, efficient, and durable device adapted foruse either as a globe-valve or a check-valve, in either of whichconstructions access is readily aorded to the valve-chamber to permitthe removal of obstructions or repairs or for truing the valve-seat bysimply removing the cap and lifting the valve from its seat withoutrendering it necessary to remove the plugor other parts of the device.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is

l. A globe or check valve comprising a casing having oppositely-disposedopenings at its top and bottom, open end portions extending transverselyof said openings, and an intermediate valve-chamber having an inlet atone side and an outlet at the other side thereof arranged above theplane of the inlet, the

forming an annular shoulder around the top of said chamber, a cup-likeplug revolubly fitted in said valve-chamber having one end protrudingthrough the opening at the bottom of the casing adapted to receive atool for turning the plug; said plug having inlet and outlet ports whichregister with the inlet and outlet orifices of the valve-chamber andadapted to close the same When the plug is given a partial revolution, areciprocatory valve seated within said cuplike plug in a plane dividingthe inlet from the outlet port-s therein, and a cap removably fixedwithin the opening at the top of the casing so as to close the same;said cap being adapted to rest on said plug and on said annular shoulderabove the valve-chamber, so as to tightly confine the plug and preventleakage between the same and the walls of said chamber, and also servingas a guide -for the valve-stem in its reciprocatory movements inestablishing communication between the inletand outlet ports of theplug, substantially as described.

2. In combination with the valve-casing open at top and bottom, andhaving oppotop of the casing being of greater bore than saidvalve-chamber and thus forming a shoulder above the same, a taperedcup-like plug Afitted Within said valve-chamber having a valve-seatabout midway of the interior of the cup, an inlet-port below said seatand an outlet-port at the opposite side thereof above said seat,together with a cap removably xed within the opening at the top of thecasing so as to close the same and confine the plug Within thevalve-chamber, said cap bearing on the plug and also the shoulder formedat the top of the'valve-chamber so as to prevent leakage between saidplug and chamber, and a reciprocating valve on said seat having its stemfitted and guided in an aperture in said cap; said plug having apolygonal projection protruding through the opening in the bottom of thecasing for the application of a suitable tool for turning the plug, anda nut screwed on said projection for securing the plug Within thecasing; substantially as described.

3. The valve-casing having acentrally-disposed chamber andoppositely-disposed end portions and top and bottom openingscommunicating withv said chamber; the upper openin g of the casinghaving a greater diameter than the intermediate portion,to provide anannular shoulder at its junction With the latter; in combination with acup-like turnplug fitting the aforesaid chamber and having its upper endsubstantially flush with said annular shoulder, together with adetachable cap or part tting the upper opening of the casing,constructed to guide and limit the movements of the valve-stem or likepart, and having a bearing upon said turnplug and annular shoulder,substantially as described.

In testimony 'whereof I affix my signature in presence of two Witnesses.

CHRISTIAN E. LOETZER.

Witnesses:

A. B. SHEURER, CLAYTON BERGHAUS.

